Home > Publications database > Untersuchungen zur Verringerung der Freisetzung fester Spaltprodukte aus beschichteten Brennstoffteilchen durch Zusätze hochschmelzender Oxide zum Brennstoffkern |
Book/Report | FZJ-2016-02855 |
; ;
1972
Kernforschungsanlage Jülich, Verlag
Jülich
Please use a persistent id in citations: http://hdl.handle.net/2128/11352
Report No.: Juel-0846-RW
Abstract: For increasing the retention of solid fission products in coated fuel particles, investigations are made on oxide fuel kernels containing special refractory oxides, e.g. Al$_{2}$O$_{3}$. It is the aim of this work to test the possibility of retaining solid fission products in the kernel by formation of stable ternary oxides. Using the Hydrolysis Process, U0$_{2}$ and (U,Th) O$_{2}$ kernels are prepared which contain the solid fission products Sr, Ba, Ce in concentrations corresponding to a burnup of about 10 % fima. After an out-of-pile heat treatment of these kernels of the fission product release is measured. The Sr release at 1250 °C is found tobe smaller by a factor 20 to 100 if the kernels contain Al$_{2}$O$_{3}$ in amounts of 1 to 5 weight percent. The solid fission products are enriched in the inclusions of Al$_{2}$O$_{3}$ which is not soluble in the UO$_{2}$ matrix of the kernel.
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